CN111256536A - Penetration cutting wire laying reinforced plane integral breaking type frangible cover and preparation method thereof - Google Patents
Penetration cutting wire laying reinforced plane integral breaking type frangible cover and preparation method thereof Download PDFInfo
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- CN111256536A CN111256536A CN202010129741.5A CN202010129741A CN111256536A CN 111256536 A CN111256536 A CN 111256536A CN 202010129741 A CN202010129741 A CN 202010129741A CN 111256536 A CN111256536 A CN 111256536A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41F—APPARATUS FOR LAUNCHING PROJECTILES OR MISSILES FROM BARRELS, e.g. CANNONS; LAUNCHERS FOR ROCKETS OR TORPEDOES; HARPOON GUNS
- F41F3/00—Rocket or torpedo launchers
- F41F3/04—Rocket or torpedo launchers for rockets
- F41F3/077—Doors or covers for launching tubes
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Abstract
The invention relates to a penetration cutting and wire laying reinforced plane integral breaking type fragile cover and a preparation method thereof, belonging to the technical field of missile launching and protection. The frangible lid of the present invention comprises: the device comprises a frame and a throwing-out body, wherein the joint of the frame and the throwing-out body is a weak area; the weak area is an area where the fiber cloth between the frame and the throwing body penetrates and is cut off according to a circular track, and the strength of the weak area is adjusted by uniformly paving fiber bundles in the paving layer; the invention has simple structure, light weight and simple and convenient operation, and the fragile cover is integrally formed without cutting and reinforcing after forming. The invention can realize the adjustment of the pressure bearing performance and the strength of the weak area of the fragile cover by adjusting the density, the number and the types of the laid filaments, so that the fragile cover can bear the pressure in a specific range and can be smoothly broken by the gas flow of the guided missile, and the fragile cover is a novel-structure fragile cover.
Description
Technical Field
The invention relates to a penetration cutting and wire laying reinforced type plane integral breaking type frangible cover and a preparation method thereof, belonging to the technical field of missile launching and protection.
Background
The missile launching box cover is an important part of a missile launching system, and the air tightness is required to be kept in a certain air pressure during missile storage and transportation; when the missile is launched, the missile needs to be started in time, and the normal launching of the missile is ensured. The traditional missile launching box cover is mostly a metal cover, and the opening mode adopts mechanical opening or blasting opening, wherein the mechanical opening mode has the defects of heavy weight, complex opening mechanical structure, easy occurrence of mechanical failure, long opening time and the like; the blasting opening mode has the defects of high use and maintenance cost, damage to electronic equipment in the warhead during blasting of the blasting bolt and the like.
In order to improve the missile launching efficiency and meet the requirement of rapid combat of troops, a composite material fragile film box cover has been developed abroad (see detail US Pat.4498368, 1985). The box cover can bear certain uniform distribution pressure, and can be broken along a preset track under small concentrated force, the reaction is rapid, and the missile launching efficiency is improved. However, the composite material launching box cover needs to be damaged under the action of the end of the missile, and the box cover inevitably has certain adverse effects on the missile warhead contacted with the box cover. The integral burst type composite material film cover (see CN 1844839A,2006) in China is characterized in that airflow generated by an engine before missile launching is used for impacting the film cover, the film cover is integrally destroyed in a preset track, and adverse effects on missile launching are avoided. The domestic composite material fragile cover is ejected in a directional mode (see CN 104864773A and 2015 for details), and the separation area and the connection area are arranged, so that the fragile cover ejection body is ejected in a directional mode under the impact of airflow, and the problem that the direction of the composite material fragile cover ejection separation body is uncertain is solved. Above two kinds of domestic breakable lids all need to cut the lid after the solidification and glue again to paste the cloth in the department both sides that glue and paste in order to ensure gas tightness and reinforcing structural strength, the technology is complicated, and the quality stability is difficult to control. Therefore, the transmission box cover of the type has certain limitations in practical application.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a penetration cutting and wire laying reinforced plane integral breaking type fragile cover and a preparation method thereof.
The invention is realized by the following steps:
a penetration cutting wire-laying reinforced type plane integral breaking type fragile cover comprises a frame, a throwing-out body and a weak area at the joint of the frame and the throwing-out body, and is characterized in that the fragile cover is integrally formed and solidified, and the weak area is an area where fiber cloth between the frame and the throwing-out body penetrates and is cut off according to a circular track; the frame and the throwing body are formed by curing and molding fiber cloth by taking epoxy resin glue as a matrix, the frame and the throwing body are penetrated and cut off according to a circular track before being cured after being dipped in glue, fiber bundles are uniformly laid in a cut cover body laying layer, and the strength of a weak area is adjusted by laying the fiber bundles in the laying layer. Fiber bundles are uniformly laid in the cover body laying layer after penetrating and cutting, the strength of the weak area is enhanced, and the pressure bearing and breaking performance of the fragile cover is controlled by adjusting the density of the laid fibers, the number of layers of the laid fibers and the types of the laid fibers.
The fiber cloth in the cover body laying layer is penetrated and cut off after gum dipping and before curing, then pre-dipped fiber bundles are uniformly laid in the laying layer, and finally the fiber bundles are directly cured and integrally formed without cutting, gluing and additional reinforcement after curing, so that the cover body is compact and attractive in structure.
Furthermore, the frame and the throwing body are made of high-strength glass fiber bidirectional plain cloth reinforced epoxy resin composite material, the composite material is formed by curing and molding the high-strength glass fiber bidirectional plain cloth by taking epoxy resin glue as a matrix, and the layering mode is [ (0/90)/(+/-45)]n. The invention adopts the layering sequence to ensure that the integral structure of the fragile cover can obtain the performance characteristic of quasi isotropy, thereby obtaining the uniform and stable bearing performance of the weak area.
The invention also discloses a preparation method of the penetration cutting wire-laying reinforced type plane integral breaking type fragile cover, which is characterized by comprising the following steps:
1) cutting out high-strength glass fiber bidirectional plain cloth with required size and quantity;
2) preparing a required kind and number of fiber bundles, wherein the fiber bundles can be glass fibers or carbon fibers;
3) cleaning the die, laying a rubber pad on the die, and sticking polyester fragile plastic paper on the rubber pad;
4) preparing epoxy resin;
5) dividing the fiber cloth into required parts according to the preset number of fiber laying layers;
6) paving each fiber cloth layer by layer according to a set paving sequence, and enabling the glue solution of each layer to uniformly permeate;
7) drawing respective cutting tracks on each laying layer respectively, and cutting off the laying layers according to the tracks; the cutting track in the invention is a region where the circular track penetrates and is cut off, and the diameter of the cutting track is the same as that of the actually designed throwing body, namely the edge of the circular throwing body. In actual operation, a sign pen with the thickness of 0.5mm is used for drawing a track, and then a scalpel is used for cutting the cloth layer along the track.
8) Dipping the fiber bundle in glue;
9) taking out one part of the ply without laying silk, and uniformly laying the pre-impregnated fiber bundles with preset number and types on the upper surfaces of the other plies;
10) stacking all the layers of the laid filaments together according to a preset layer stacking sequence, and then stacking the layers without the laid filaments;
11) covering the mold, and curing at room temperature;
12) heat treatment, cooling and demoulding;
13) cutting, grinding and polishing to finish the manufacture of the fragile cover;
furthermore, the fiber cloth in the cover body laying layer is penetrated and cut off after gum dipping and before solidification, then fiber bundles which are pre-dipped in gum are uniformly laid in the laying layer, and finally the fiber bundles are integrally formed and solidified. Meanwhile, the forming process is simple and easy to implement and convenient to operate.
The beneficial effects of the invention and the prior art are as follows:
the method comprises the steps that fiber cloth is penetrated and cut off according to a circular track during gum dipping to manufacture a weak area, and prepreg fiber bundles of preset types, numbers and layers are uniformly laid in the middle of a cut layer to adjust the strength of the weak area, so that the pressure-bearing performance and the bursting performance of the fragile cover are adjusted;
the fragile cover has the advantages of strong designability, controllable mechanical property of a weak area, simple process, no need of repeated cutting, repeated curing and additional reinforcement, more controllable quality stability, capability of being integrally formed, compact and attractive structure and accordance with new requirements of the fragile cover.
The invention has simple structure, light weight and simple and convenient operation, the fragile cover is integrally formed, cutting and reinforcement are not needed after forming, and the pressure bearing performance and the strength of a weak area of the fragile cover can be adjusted by adjusting the density, the number of layers and the type of the laid wires, so that the fragile cover can bear the pressure in a specific range and can be smoothly broken by the gas flow of a guided missile, and the fragile cover is a novel-structure fragile cover.
Drawings
FIG. 1 is a schematic view of a penetration cutting wire-laying reinforced planar integral break-through frangible cover according to the present invention;
FIG. 2 is a schematic view of the laying of a through cut, wire-laid reinforced, planar integrally-breached frangible cover in accordance with the present invention;
FIG. 3 is a schematic view of a penetration cutting wire-laying reinforced type flat integral breaking frangible cover of the present invention installed on an inflation test apparatus;
wherein, 1, a frame, 2, a weak area, 3, a throwing body, 4 and a fiber bundle.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention more clear, the present invention is further described in detail by the following examples. It should be noted that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The preparation process of the penetration cutting wire-laying reinforced type plane integral breaking type frangible cover in the embodiment comprises the following steps:
1) cutting 6 pieces of high-strength bidirectional glass fiber cloth with the thickness of 330mm multiplied by 330 mm;
2) preparing 8 high-strength glass fiber bundles with the length of 250 mm;
3) cleaning the die, laying a rubber pad on the die, and sticking polyester fragile plastic paper on the rubber pad;
4) preparing epoxy resin;
5) dividing the fiber cloth into two parts, each part is 3 pieces;
6) paving each part of fiber cloth according to the sequence of [ (0/90)/(+ -45)/(0/90) ] and enabling the glue solution of each layer to uniformly penetrate;
7) respectively sticking polyester fragile plastics on the upper surface of each layer, drawing circular tracks with the diameter of 200mm on plastic paper, and cutting the circular tracks through the circular tracks;
8) dipping the fiber bundle in glue;
9) tearing off the polyester fragile plastic paper on the upper surfaces of the two layers, and uniformly paving 8 high-strength glass fiber bundles on the upper surface of one layer, wherein the angles between the fiber bundles are 22.5 degrees;
10) with the center of circle as a reference point, according to the layering sequence [ (0/90)/(+ -45)]3Laying layers without laid filaments on the layers with laid filaments, and clamping the laid fiber bundles between the third layer of cloth and the fourth layer of cloth of the cover body;
11) covering the mold, and curing at room temperature;
12) heat treatment, cooling and demoulding;
13) cutting, grinding and polishing, and finishing the manufacture of the fragile cover.
The fragile cover prepared by the method comprises a frame 1, a throwing body 3 and a weak area 2 at the joint of the frame 1 and the throwing body 3, wherein the frame 1 and the throwing body 3 are both formed by curing and molding fiber cloth by taking epoxy resin glue as a matrix, the frame 1 and the throwing body 3 are penetrated and cut off according to a circular track before being uncured after being dipped in glue, and fiber bundles 4 are uniformly laid in a cover body laying layer after being cut, so that the strength of the weak area is adjusted.
The prepared penetration cutting wire-laying reinforced type plane integral breaking type fragile cover is installed on an inflation test device as shown in fig. 3, when the air pressure in the device is loaded to the set breaking pressure of the fragile cover, the fiber bundles laid in the cover body laying layer are broken, the weak area 2 is broken, and the throwing body 3 is separated from the frame 1 and thrown out.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.
Claims (4)
1. A penetration cutting wire-laying reinforced type plane integral breaking type fragile cover comprises a frame (1), a throwing-out body (3) and a weak area (2) at the joint of the frame (1) and the throwing-out body (3), and is characterized in that the fragile cover is formed by integral forming and curing, and the weak area (2) is an area where fiber cloth penetrates and is cut off between the frame (1) and the throwing-out body (3) according to a circular track; the frame (1) and the throwing-out body (3) are formed by curing and molding fiber cloth through epoxy resin adhesive serving as a matrix, the frame (1) and the throwing-out body (3) are penetrated and cut off according to a circular track before being cured after being dipped in glue, fiber bundles (4) are uniformly laid in a cut cover body laying layer, and the strength of a weak area is enhanced by uniformly laying the fiber bundles.
2. The through-cut and wire-laid reinforced type plane integral-piercing frangible cover as claimed in claim 1, wherein the frame (1) and the projectile (3) are made of high-strength glass fiber bidirectional plain cloth reinforced epoxy resin composite material, and the composite material is formed by fixing high-strength glass fiber bidirectional plain cloth through epoxy resin glue as a matrixFormed by chemical molding, and the layering mode is [ (0/90)/(+/-45)]n。
3. The method for preparing the penetration cutting wire-laying reinforced type plane integral breaking type fragile cover according to any one of claims 1 to 2, wherein the method comprises the following steps:
1) cutting out high-strength glass fiber bidirectional plain cloth with required size and quantity;
2) preparing the required kinds and numbers of fiber bundles;
3) cleaning the die, laying a rubber pad on the die, and sticking polyester fragile plastic paper on the rubber pad;
4) preparing epoxy resin;
5) dividing the fiber cloth into required parts according to the preset number of fiber laying layers;
6) paving each fiber cloth layer by layer according to a set paving sequence, and enabling the glue solution of each layer to uniformly permeate;
7) drawing respective cutting tracks on each laying layer respectively, and cutting off the laying layers according to the tracks;
8) dipping the fiber bundle in glue;
9) taking out one part of the ply without laying silk, and uniformly laying the pre-impregnated fiber bundles with preset number and types on the upper surfaces of the other plies;
10) stacking all the layers of the laid filaments together according to a preset layer stacking sequence, and then stacking the layers without the laid filaments;
11) covering the mold, and curing at room temperature;
12) heat treatment, cooling and demoulding;
13) cutting, grinding and polishing, and finishing the manufacture of the fragile cover.
4. The method for preparing the through-cut wire-laid reinforced type plane integral-piercing frangible cover as claimed in claim 3, wherein the fiber cloth in the cover body laying layer is cut through after dipping and before curing, and then pre-dipped fiber bundles are uniformly laid in the laying layer, and finally integrally molded and cured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010129741.5A CN111256536B (en) | 2020-02-28 | 2020-02-28 | Penetration cutting wire laying reinforced plane integral breaking type frangible cover and preparation method thereof |
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| CN202010129741.5A CN111256536B (en) | 2020-02-28 | 2020-02-28 | Penetration cutting wire laying reinforced plane integral breaking type frangible cover and preparation method thereof |
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| CN111256536A true CN111256536A (en) | 2020-06-09 |
| CN111256536B CN111256536B (en) | 2021-06-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112644111A (en) * | 2020-12-09 | 2021-04-13 | 南京航空航天大学 | Composite material plane fragile cover with mooring function and preparation method thereof |
| CN113701557A (en) * | 2021-08-30 | 2021-11-26 | 贵州航天天马机电科技有限公司 | Large external pressure low impact force frangible cover |
| CN113819802A (en) * | 2021-09-06 | 2021-12-21 | 南京航空航天大学 | Composite material frangible cover with automatic reset function and preparation method thereof |
| CN115014125A (en) * | 2022-06-17 | 2022-09-06 | 北京新风航天装备有限公司 | Breakable thin film cover made of carbon fiber composite material and broken according to preset path |
| CN115479501A (en) * | 2022-09-06 | 2022-12-16 | 上海交通大学 | Multi-flap resin-based composite material fragile protective cover and preparation method thereof |
| CN117162543A (en) * | 2023-11-01 | 2023-12-05 | 上海材料研究所有限公司 | Elastic composite material resistant to instantaneous gas flow impact and preparation method and application thereof |
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| CN103913099A (en) * | 2014-03-12 | 2014-07-09 | 南京航空航天大学 | Integral hollow composite material firing box cover |
| CN107011648A (en) * | 2017-06-01 | 2017-08-04 | 哈尔滨工业大学 | A kind of Kevlar fiber cloths enhancing polyureas based composites and preparation method thereof |
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| CN101495406A (en) * | 2005-12-14 | 2009-07-29 | 格拉弗技术国际控股有限公司 | Method for debundling and dispersing carbon fiber filaments uniformly throughout carbon composite compacts before densification |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112644111A (en) * | 2020-12-09 | 2021-04-13 | 南京航空航天大学 | Composite material plane fragile cover with mooring function and preparation method thereof |
| CN112644111B (en) * | 2020-12-09 | 2021-10-15 | 南京航空航天大学 | Composite material plane fragile cover with mooring function and preparation method thereof |
| CN113701557A (en) * | 2021-08-30 | 2021-11-26 | 贵州航天天马机电科技有限公司 | Large external pressure low impact force frangible cover |
| CN113819802A (en) * | 2021-09-06 | 2021-12-21 | 南京航空航天大学 | Composite material frangible cover with automatic reset function and preparation method thereof |
| CN115014125A (en) * | 2022-06-17 | 2022-09-06 | 北京新风航天装备有限公司 | Breakable thin film cover made of carbon fiber composite material and broken according to preset path |
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| CN115479501A (en) * | 2022-09-06 | 2022-12-16 | 上海交通大学 | Multi-flap resin-based composite material fragile protective cover and preparation method thereof |
| CN115479501B (en) * | 2022-09-06 | 2024-03-26 | 上海交通大学 | Multi-flap type resin matrix composite fragile protective cover and preparation method thereof |
| CN117162543A (en) * | 2023-11-01 | 2023-12-05 | 上海材料研究所有限公司 | Elastic composite material resistant to instantaneous gas flow impact and preparation method and application thereof |
| CN117162543B (en) * | 2023-11-01 | 2024-02-13 | 上海材料研究所有限公司 | Elastic composite material resistant to instantaneous gas flow impact and preparation method and application thereof |
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| CN111256536B (en) | 2021-06-22 |
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